Barrier

Three magical runes of magical or physical force force appear upon your person and protect you. When cast, choose a type of barrier, physical or magical. Magical barrier runes will grant a +5 bonus to AC to direct spell attacks and saving throws against spells and spell effects. Physical barrier runes will grant a +5 bonus to AC against physical attacks and +5 saving throws against physical effects and conditions such as grapple or prone. Upon activation and the rune type selected, including against the triggering attack, the runes can be spent using your reaction against triggering attacks or last for 1 minute or until dispelled or recast.  Furthermore, while at least 1 rune is active, you take no damage from magic missile.